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chainload.py: Support SMP when loading XNU

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Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2021-05-12 21:16:33 +09:00
parent 4e545d0513
commit ec5388d6b5
1 changed files with 13 additions and 4 deletions
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17
proxyclient/chainload.py
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@ -3,7 +3,7 @@
import argparse, pathlib, time
parser = argparse.ArgumentParser(description='Mach-O loader for m1n1')
parser.add_argument('-s', '--sepfw', action="store_true", help="Copy SEP firmware")
parser.add_argument('-x', '--xnu', action="store_true", help="Load XNU")
parser.add_argument('-c', '--call', action="store_true", help="Use call mode")
parser.add_argument('payload', type=pathlib.Path)
parser.add_argument('boot_args', default=[], nargs="*")
@ -24,7 +24,7 @@ entry = macho.entry
entry -= macho.vmin
entry += new_base
if args.sepfw:
if args.xnu:
sepfw_start, sepfw_length = u.adt["chosen"]["memory-map"].SEPFW
else:
sepfw_start, sepfw_length = 0, 0
@ -43,18 +43,27 @@ print(f"Loading kernel image (0x{len(image):x} bytes)...")
u.compressed_writemem(image_addr, image, True)
p.dc_cvau(image_addr, len(image))
if args.sepfw:
if args.xnu:
print(f"Copying SEPFW (0x{sepfw_length:x} bytes)...")
p.memcpy8(image_addr + sepfw_off, sepfw_start, sepfw_length)
print(f"Adjusting addresses in ADT...")
u.adt["chosen"]["memory-map"].SEPFW = (new_base + sepfw_off, sepfw_length)
u.adt["chosen"]["memory-map"].BootArgs = (image_addr + bootargs_off, bootargs_size)
print("Setting secondary CPU RVBARs...")
rvbar = entry & ~0xfff
for cpu in u.adt["cpus"][1:]:
addr, size = cpu.cpu_impl_reg[0]
print(f" {cpu.name}: [0x{addr:x}] = 0x{rvbar:x}")
p.write64(addr, rvbar)
u.push_adt()
print("Setting up bootargs...")
tba = u.ba.copy()
if args.sepfw:
if args.xnu:
tba.top_of_kernel_data = new_base + image_size
else:
# SEP firmware is in here somewhere, keep top_of_kdata high so we hopefully don't clobber it